store vs granary

store and granary both are nouns.

Word	Noun	Adjective	Verb	Adverb
store	Yes	No	Yes	No
granary	Yes	No	No	No

As nouns, granary is a hyponym of store; that is, granary is a word with a more specific, narrower meaning than store:

store (noun)	granary (noun)
a mercantile establishment for the retail sale of goods or services	a storehouse for threshed grain or animal feed
a depository for goods
an electronic memory device
a supply of something available for future use

store (verb)	granary (verb)
keep or lay aside for future use
find a place for and put away for storage